This patch does not include a javascript implementating, but
provides a pure HTML/HTTP method of paging through these lists.

Also fixes erroneous limiting. We now use a hardcoded limit of 20
by default.
Signed-off-by: Kevin Morris <kevr@0cost.org>

Signed-off-by: Kevin Morris <kevr@0cost.org>

Closes #226
Signed-off-by: Kevin Morris <kevr@0cost.org>

Closes #218

Signed-off-by: Kevin Morris <kevr@0cost.org>

Signed-off-by: Kevin Morris <kevr@0cost.org>

Signed-off-by: Kevin Morris <kevr@0cost.org>

These were being displayed regardless of the dep type
and state of DepDesc. This is fixed with this commit.
Signed-off-by: Kevin Morris <kevr@0cost.org>

A few things added with this commit:

- aurweb.packages.util
    - A module providing package and pkgbase helpers.
- aurweb.template.register_filter
    - A decorator that can be used to register a filter:
      @register_filter("some_filter") def f(): pass

Additionally, template partials have been split off a bit
differently. Changes:

- /packages/{name} is defined in packages/show.html.
- partials/packages/package_actions.html is now
  partials/packages/actions.html.
- partials/packages/details.html has been added.
- partials/packages/comments.html has been added.
- partials/packages/comment.html has been added.
- models.dependency_type additions: name and id constants.
- models.relation_type additions: name and id constants.
- models.official_provider additions: base official url constant.
Signed-off-by: Kevin Morris <kevr@0cost.org>